305849 has 2 divisors, whose sum is σ = 305850. Its totient is φ = 305848.

The previous prime is 305839. The next prime is 305857. The reversal of 305849 is 948503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211600 + 94249 = 460^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 305849 - 2⁸ = 305593 is a prime.

It is a super-2 number, since 2×305849² = 187087221602, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 305849.

It is not a weakly prime, because it can be changed into another prime (305839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152924 + 152925.

It is an arithmetic number, because the mean of its divisors is an integer number (152925).

2³⁰⁵⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

305849 is a deficient number, since it is larger than the sum of its proper divisors (1).

305849 is an equidigital number, since it uses as much as digits as its factorization.

305849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 305849 is about 553.0361651827. The cubic root of 305849 is about 67.3755548893.

The spelling of 305849 in words is "three hundred five thousand, eight hundred forty-nine".